![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
如图所示,设S1、S2为两相干光源发出波长为l的单色光,分别通过两种介质(折射率分别为n1和n2,且n1>n2)射到介质的分界面上的P点,己知S1P =S2P= r,则这两条光的几何路程Dr, 光程差d 和相位差Dj 分别为 [ ]【图片】
A.
D r = 0 , d =0 , D j = 0
B.
D r = ( n 1 - n 2 ) r , d =( n 1 - n 2 ) r , D j =2 p ( n 1 - n 2 ) r / l
C.
D r = 0 , d =( n 1 - n 2 ) r , D j =2 p ( n 1 - n 2 ) r / l
D.
D r = 0 , d =( n 1 - n 2 ) r , D j =2 p ( n 1 - n 2 ) r